[cessor]

This is, as everybody noticed - HORRIBLE advice. Imagine this: You mind your own business on - let's say a man-to-man datings site. You don't appear to have a problem with homosexuality, but MAYBE your wife or your employer does. Like this, when they put in your private, personal email address and the website basically tells them: "Yep, you got it, that guy has an accout here". This "meta data" is quite sensitive information, if you ask me, not only from a security point of view, but from a privacy one. Holy moly, don't follow this advice.